Timer for fords and fordson tractors



July 21, 1925.

A. C. CASTILLO TIMER FOR FORDS AND FCRDSON TRACTORS Filed Feb. 8, 1922.2 Sheets-Sheet 1 Iliumallozucq July 21, 1925. 1,547,030

A. c. CASTILLO TIMER FOR FORDS AND FORDSON TRACTORS Filed Feb. 8, 1922 2Sheets -Sheet 2 flaamzzo.

Patented July 21, 1825.

UNITED STATES $47,030 PATENT OFFlC iii ALFONZO C. CASTILLO, OF SOCORRD,NEW MEXICO, ASSLEGNOR TO M- C. SPICEB, OF N FRANCISCO, CALIFORNIA.

, TIMER FOR FORDS AND FORDSON' TRACTORS.

Application filed February 8, 1922. Serial No. 534,896.

To all whom it may concern:

Be it known that I, ALFONZO C. CASTILLO,

a citizen of the United States, residing at Socorro, in the county ofSocorro and State of New Mexico, have invented certain new and usefulImprovements in Timers for Fords and Fordson Tractors, of which thefollowing is a specification.

This invention relates to an improvement 19 in timers for the ignitionsystem of internal combustion engines, particularly of the Ford type-andis designed to provide a construction as a substitute for the presentrotary contact arrangement.

It is a principalobject of my invention to provide a timing mechanismwhich may be readily attached to any Ford or Fordson tractor engine,which will be positive in action, simple in construction and easily asrepaired.

It is a further object of my invention to provide a timing mechanismwhich is mounted on the engine body in proximity to the valve stemsandis so associated with the exhaust valve stems as to be operated andcontrolled thereby. It is a further feature of my invention to provide atimer so constructed that frictional or rolling on gagen'ient betweenthe contacts is avoided.

In the accompanying drawings forming a part of this specification,

Figure 1 is a side elevation of a Ford type of engine with my timingmechanism installed therein;

Figure 2 is a detail vertical sectional view 011 the line 22 of Figure1;

Figure 3 is a detail vertical sectional view on the line 33 of Figure 1;

Figure at is a side perspective view of one of the contact carryingarms, and

Figures 5, 6 and 7 illustrate details of construction.

Referring now more specifically to the drawings by numerals ofreference, in

which the characters designate like parts thruout the several figures,an engine of the Ford type is indicated generally at 2, a coil box at i.and the wiring of the ignition sys tem generally at 6.

Referring particularly to Figure 1, I have shown the right hand side ofa Ford motor with the valve case covers removed, and illustrating thevalve arrangement, which includes intake valve stems A, B, G n and D andexhaust valve stems E, F, G and H operated thru push rods 8 from cams oncam shaft 10.

The timing mechanism includes a metallic rocker arm 12 (duplicated ineach valve case 14;) pivoted intermediate its ends thru an opening 16 ona shaft 18 threaded at 19 into the wall 20 of the cylinder, the saidshaft being rigidly secured against displacement by a nut 21 and lockwasher 22. The rocker arm 12 is free to oscillate on the shaft 13 but isheld against lateral movement in either direction thru nuts 23 threadedon the latter. At either end, the rocker arm is cut away at 24; toprovide a clearance recess for purposes to be described later.

On the outer face of said rocker arm 12 and in vertical alinement withits respective exhaust valve stem, is a rigid horizontal threaded stud25, carrying a soft steel contact finger 26 which is insulated from thestud 25 thru an insulating bushing sleeve 28. The eye 29 of a conductor30 passes around the sleeve 28 and is maintained in electrical contactwith the contact finger 26 by a nut 32 threaded on the stud 25, aninsulating washer 33 being interposed between the inner face of said nutand the metallic eye of the conductor. The lower end of the finger 26 ispreferably curved outwardly as at 3 1- and is adapted to periodicallymake and break the circuit thru the secondary of the ignition systemthru its engagement and disengagement with a co-operating contact linger36 mounted upon the valve stem intermediate the valve spring pin 38 andthe valve spring washer 39, the finger 36 at its rear portion beingapertured to permit passage of the valve stem therethru. The contactingend 40 of the finger 36 is slightly below the plane of the rear portionto provide the necessary clearance and to permit the proper point in thecycle of the engine being attained before the circuit is completed toignite the charge of the explosive mixture in the cylinder which itcontrols, it being understood that the finger 36 movesin unison with thevalve stem with which it is associated.

The order in which the cylinders fire is as follows: two, four, one,three.

Referring to Figure 1 by way of an example in which my timer operates,it will be assumed that exhaust valve stem F is elevated, bringing end40 of contact finger 36 into electrical contact with finger 26. The

electric circuit of the ignition system is now closed thru the secondarywhich includes wires U, coil posts V and W, wire X, spark plug Y ofcylinder number t and to. ground. During the engagement of the contactfingers 26 and 36, the rocker arm 12 is permitted to oscillate to aslight degree.

It will be understood that the contacts, controlling the circuits to thevarious cyl inders are made and broken in proper sequence.

While 1 have particularly described the elements best adapted to performthe functions set forth, it is obvious that various changes in form,proportion and in the minor details of construction may be resorted to,within the scope of the appended claims, without departing from thespirit or sacrificing any of the principles of the inventionl Havingthus described the construction and operation of my invention, what Iclaim as new and desire to protect by Letters Patent is:

1. In a timing mechanism for gas engines, the combination with theengine body and the exhaust valve stems therefor, contacts carried bysaid valve stems; of a rocker arm supported on said engine body andadapted for oscillatory movement thereon,

contacts carried by said arm and connected with the secondary of anignition system, said last mentioned contacts extending throughapertures provided in said rocker arm, the contacts on said rocker armengaging the contacts on said valve stems periodically to make and breakthe circuit of the secondary of said ignition system.

2. In a timing mechanism for gas engines, the combination with theengine body and the exhaust valve stems therefor, of a rocker armsupported on said engine body and adapted for oscillatory movementthereon, said arm operating in a vertical plane substantially parallelto the vertical plane passing through said valve stems and spacedoutwardly therefrom, a contact extending laterally adjacent each end ofsaid arm, a second contact carried by each of said valve stems andextending laterally therefrom, said second contacts being disposed belowsaid first mentioned contacts, and adapted for engagement therewithperiodically to make and break the circuit of the secondary of theignition system electrically connected to the contacts on said arm.

ture.

ALFONZO C. CASTILLO.

In testimony whereof I aflix my signa-

